<?php
/**
 * File: Cdnfsd_Core.php
 *
 * @package W3TC
 */

namespace W3TC;

/**
 * Core for FSD CDN.
 */
class Cdnfsd_Core {
	/**
	 * Get the CDN engine object.
	 *
	 * @returns object
	 * @throws \Exception Exception.
	 */
	public function get_engine() {
		static $engine_object = null;

		if ( is_null( $engine_object ) ) {
			$c = Dispatcher::config();
			$engine = $c->get_string( 'cdnfsd.engine' );

			switch ( $engine ) {
				case 'cloudflare':
					$engine_object = null; // Extension handles everything.
					break;

				case 'transparentcdn':
					$engine_object = new Cdnfsd_TransparentCDN_Engine(
						array(
							'company_id'    => $c->get_string( 'cdnfsd.transparentcdn.company_id' ),
							'client_id'     => $c->get_string( 'cdnfsd.transparentcdn.client_id' ),
							'client_secret' => $c->get_string( 'cdnfsd.transparentcdn.client_secret' ),
						)
					);
					break;

				case 'cloudfront':
					$engine_object = new Cdnfsd_CloudFront_Engine(
						array(
							'access_key'      => $c->get_string( 'cdnfsd.cloudfront.access_key' ),
							'secret_key'      => $c->get_string( 'cdnfsd.cloudfront.secret_key' ),
							'distribution_id' => $c->get_string( 'cdnfsd.cloudfront.distribution_id' ),
						)
					);
					break;

				case 'limelight':
					$engine_object = new Cdnfsd_LimeLight_Engine(
						array(
							'short_name' => $c->get_string( 'cdnfsd.limelight.short_name' ),
							'username'   => $c->get_string( 'cdnfsd.limelight.username' ),
							'api_key'    => $c->get_string( 'cdnfsd.limelight.api_key' ),
							'debug'      => $c->get_string( 'cdnfsd.debug' ),
						)
					);
					break;

				case 'stackpath':
					$engine_object = new Cdnfsd_StackPath_Engine(
						array(
							'api_key' => $c->get_string( 'cdnfsd.stackpath.api_key' ),
							'zone_id' => $c->get_integer( 'cdnfsd.stackpath.zone_id' ),
						)
					);
					break;

				case 'stackpath2':
					$state = Dispatcher::config_state();

					$engine_object = new Cdnfsd_StackPath2_Engine(
						array(
							'client_id' => $c->get_string( 'cdnfsd.stackpath2.client_id' ),
							'client_secret' => $c->get_string( 'cdnfsd.stackpath2.client_secret' ),
							'stack_id' => $c->get_string( 'cdnfsd.stackpath2.stack_id' ),
							'site_root_domain' => $c->get_string( 'cdnfsd.stackpath2.site_root_domain' ),
							'domain' => $c->get_array( 'cdnfsd.stackpath2.domain' ),
							'ssl' => $c->get_string( 'cdnfsd.stackpath2.ssl' ),
							'access_token' => $state->get_string( 'cdnfsd.stackpath2.access_token' ),
							'on_new_access_token' => array( $this, 'on_stackpath2_new_access_token' ),
						)
					);
					break;

				case 'bunnycdn':
					$engine_object = new Cdnfsd_BunnyCdn_Engine(
						array(
							'account_api_key' => $c->get_string( 'cdn.bunnycdn.account_api_key' ),
							'pull_zone_id'    => $c->get_integer( 'cdnfsd.bunnycdn.pull_zone_id' ),
						),
					);
					break;

				default:
					throw new \Exception( esc_html( __( 'Unknown engine', 'w3-total-cache' ) . ' ' . $engine ) );
					break;
			}
		}

		return $engine_object;
	}

	/**
	 * Save new StackPath access token.
	 *
	 * @param string $access_token Access token.
	 */
	public function on_stackpath2_new_access_token( $access_token ) {
		$state = Dispatcher::config_state();
		$state->set( 'cdnfsd.stackpath2.access_token', $access_token );
		$state->save();
	}
}